Non reciprocal circuit device and communication equipment

Application Number: 00107053
Application Date: 2000.04.24
Publication Number: 1271974
Publication Date: 2000.11.01
Priority Information: 2000/2/16 JP 038459/00; 1999/4/23 JP 117254/99
International: H01P1/36;H01P1/38
Applicant(s) Name: Murata Manufacturing Co., Ltd.
Inventor(s) Name: Makino Toshihiro;Yama Hiromoto;Hasegawa Taka
Patent Agency Code: 31100
Patent Agent: shen zhaokun
Abstract A nonreciprocal circuit device, which includes a permanent magnet; a ferrite to which a DC magnetic field is applied by the permanent magnet; a plurality of center electrodes extending from a first major surface of the ferrite to a second major surface of the ferrite via side surfaces of the ferrite; a ground plate disposed on the second major surface side of the ferrite and electrically connected to the plurality of center electrodes; a plurality of matching capacitors electrically connected between the ground plate and port sections of the plurality of center electrodes respectively; and at least one of the matching capacitors being disposed such that the capacitor electrode face thereof and the ferrite form an angle in a range of 60 degrees to 120 degrees.